<template>
  <view class="viewport">
    <!-- 推荐封面 -->
    <view class="cover">
      <image :src="bannerPicture"></image>
    </view>
    <!-- tab栏 -->
    <view class="tabs">
      <text
        class="text"
        v-for="(item, index) in recommendList"
        :key="index"
        :class="{ active: index === activeIndex }"
        @tap="activeIndex = index"
      >
        {{ item.subTypes.title }}
      </text>
    </view>
    <!-- 列表内容 -->
    <scroll-view
      scroll-y
      class="scroll-view"
      @scrolltolower="handleScrolltolower"
      v-for="(item, index) in recommendList"
      :key="index"
      v-show="activeIndex === index"
    >
      <view class="goods">
        <navigator
          hover-class="none"
          class="navigator"
          v-for="goods in item.goodsItems.items"
          :key="goods.id"
          :url="`/pages/goods/index?id=${goods.id}`"
        >
          <image class="thumb" :src="goods.picture"></image>
          <view class="name ellipsis">{{ goods.name }}</view>
          <view class="price">
            <text class="symbol">¥</text>
            <text class="number">{{ goods.price }}</text>
          </view>
        </navigator>
      </view>
      <view class="loading" v-if="hasMore">正在加载...</view>
    </scroll-view>
  </view>
</template>

<script>
import { getRecommend } from "@/http/home";
export default {
  data() {
    return {
      // 背景大图
      bannerPicture: "",
      // 当前显示的tab栏
      activeIndex: 0,
      // 列表数据
      recommendList: [],
      hasMore: true,
    };
  },
  async onLoad({ type }) {
    const urlMap = {
      1: { title: "特惠推荐", url: "/home/preference/mutli" },
      2: { title: "爆款推荐", url: "/home/inVogue/mutli" },
      3: { title: "一站买全", url: "/home/oneStop/mutli" },
      4: { title: "领券中心", url: "/home/new/mutli" }, // 后端未提供，暂用新鲜好物url
      5: { title: "新鲜好物", url: "/home/new/mutli" },
    };
    // 当前对应信息
    this.currentInfo = urlMap[type];
    uni.setNavigationBarTitle({ title: this.currentInfo.title });
    const res = await getRecommend(this.currentInfo.url);
    console.log(res);
    // 大图
    this.bannerPicture = res.result.bannerPicture;
    // 标题渲染
    this.recommendList = res.result.subTypes.map((v) => {
      const currentId = v.id;
      return { subTypes: v, goodsItems: res.result.goodsItems[currentId] };
    });
  },
  methods: {
    // 上拉加载更多
    async handleScrolltolower() {
      // 当前页和总页数进行比较
      if (
        this.recommendList[this.activeIndex].goodsItems.page >=
        this.recommendList[this.activeIndex].goodsItems.pages
      ) {
        uni.showToast({
          title: "真的没有了",
          icon: "none",
        });
        this.hasMore = false;
      } else {
        // 需要传递的参数
        const currentId = this.recommendList[this.activeIndex].subTypes.id;
        const data = {
          subType: currentId,
          pageSize: 10,
          page: this.recommendList[this.activeIndex].goodsItems.page + 1,
        };
        const res = await getRecommend(this.currentInfo.url, data);
        // console.log(res);
        const newGoodsItems = res.result.goodsItems[currentId];
        this.recommendList[this.activeIndex].goodsItems = {
          ...newGoodsItems,
          // 拼接数据数组
          items: [
            ...this.recommendList[this.activeIndex].goodsItems.items,
            ...newGoodsItems.items,
          ],
        };

        // this.recommendContentList[this.activeIndex].goodsItem.page++;
        // // 当前tap栏ID
        // const indexId = this.recommendList[this.activeIndex].subTypes.id;
        // // 传入对应参数获取数据
        // const res = await getRecommend(this.currentInfo.url, {
        //   subType: indexId,
        //   pageSize: 10,
        //   page: this.recommendContentList[this.activeIndex].goodsItem.page,
        // });
        // this.recommendContentList[this.activeIndex].goodsItem.items = [
        //   ...this.recommendContentList[this.activeIndex].goodsItem.items,
        //   ...res.result.goodsItems[indexId].items,
        // ];
      }
    },
  },
};
</script>

<style lang="scss">
page {
  height: 100%;
  background-color: #f4f4f4;
}
.viewport {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 180rpx 0 0;
  position: relative;
}
.cover {
  width: 750rpx;
  height: 225rpx;
  border-radius: 0 0 40rpx 40rpx;
  overflow: hidden;
  position: absolute;
  left: 0;
  top: 0;
}
.tabs {
  display: flex;
  justify-content: space-evenly;
  height: 100rpx;
  line-height: 90rpx;
  margin: 0 20rpx;
  font-size: 28rpx;
  border-radius: 10rpx;
  box-shadow: 0 4rpx 5rpx rgba(200, 200, 200, 0.3);
  color: #333;
  background-color: #fff;
  position: relative;
  z-index: 9;
  .text {
    margin: 0 20rpx;
    position: relative;
  }
  .active {
    &::after {
      content: "";
      width: 40rpx;
      height: 4rpx;
      transform: translate(-50%);
      background-color: #27ba9b;
      position: absolute;
      left: 50%;
      bottom: 24rpx;
    }
  }
}
.scroll-view {
  flex: 1;
  overflow: hidden;
}
.goods {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding: 0 20rpx 20rpx;
  .navigator {
    width: 345rpx;
    padding: 20rpx;
    margin-top: 20rpx;
    border-radius: 10rpx;
    background-color: #fff;
  }
  .thumb {
    width: 305rpx;
    height: 305rpx;
  }
  .name {
    height: 88rpx;
    font-size: 26rpx;
  }
  .price {
    line-height: 1;
    color: #cf4444;
    font-size: 30rpx;
  }
}
.goods .symbol,
.goods .decimal {
  font-size: 70%;
}
</style>